Preheat oven to 375 degrees Fahrenheit.

Line cookie sheets with parchment paper.

Mix butter with 1/2 cup powdered sugar and vanilla with electric mixer until fluffy.

Add flour and salt until dough comes together.

If dough is too soft chill so that it can be worked with your hands.

Scoop 1 tbsp balls of dough onto cookie sheet.

Bake 7-8 minutes until bottoms are just slightly brown.

Remove from oven and let cool several minutes.

Fill small bowl with powdered sugar.

While still warm, roll each cookie ball until covered with powdered sugar.

Place on rack to cool.

Roll again in powdered sugar if required.